Various websites attribute the following quote to the syndicated columnist Sydney J. Harris (1917-1986):
"Regret for the things we did can be tempered by time; it is regret for the things we did not do that is inconsolable."
A search on the Newspaperarchive.com database finds that this quote did indeed appear in Harris' column on Jan. 8, 1951 (syndicated in the Daily Courier of Waterloo, Iowa).
